discourse/config/initializers/004-message_bus.rb
Sam fa2a5f6f56
FEATURE: SKIP_DB_AND_REDIS env var (#7756)
Sometimes we would like to create a base image without any DB access, this
assists in creating custom base images with custom plugins that already
includes `public/assets`

Following this change set you can run:

```
SPROCKETS_CONCURRENT=1 DONT_PRECOMPILE_CSS=1 SKIP_DB_AND_REDIS=1 RAILS_ENV=production bin/rake assets:precompile
```

Then it is straight forward to create a base image without needing a DB or
Redis.
2019-06-13 12:58:27 +10:00

118 lines
3.1 KiB
Ruby

# frozen_string_literal: true
if GlobalSetting.skip_redis?
MessageBus.configure(backend: :memory)
return
end
MessageBus.site_id_lookup do |env = nil|
if env
setup_message_bus_env(env)
env["__mb"][:site_id]
else
RailsMultisite::ConnectionManagement.current_db
end
end
def setup_message_bus_env(env)
return if env["__mb"]
host = RailsMultisite::ConnectionManagement.host(env)
RailsMultisite::ConnectionManagement.with_hostname(host) do
extra_headers = {
"Access-Control-Allow-Origin" => Discourse.base_url_no_prefix,
"Access-Control-Allow-Methods" => "GET, POST",
"Access-Control-Allow-Headers" => "X-SILENCE-LOGGER, X-Shared-Session-Key, Dont-Chunk, Discourse-Visible"
}
user = nil
begin
user = CurrentUser.lookup_from_env(env)
rescue Discourse::InvalidAccess => e
# this is bad we need to remove the cookie
if e.opts[:delete_cookie].present?
extra_headers['Set-Cookie'] = '_t=del; path=/; expires=Thu, 01 Jan 1970 00:00:00 GMT'
end
rescue => e
Discourse.warn_exception(e, message: "Unexpected error in Message Bus")
end
user_id = user && user.id
is_admin = !!(user && user.admin?)
group_ids = if is_admin
# special rule, admin is allowed access to all groups
Group.pluck(:id)
elsif user
user.groups.pluck('groups.id')
end
if env[Auth::DefaultCurrentUserProvider::BAD_TOKEN]
extra_headers['Discourse-Logged-Out'] = '1'
end
hash = {
extra_headers: extra_headers,
user_id: user_id,
group_ids: group_ids,
is_admin: is_admin,
site_id: RailsMultisite::ConnectionManagement.current_db
}
env["__mb"] = hash
end
nil
end
MessageBus.extra_response_headers_lookup do |env|
setup_message_bus_env(env)
env["__mb"][:extra_headers]
end
MessageBus.user_id_lookup do |env|
setup_message_bus_env(env)
env["__mb"][:user_id]
end
MessageBus.group_ids_lookup do |env|
setup_message_bus_env(env)
env["__mb"][:group_ids]
end
MessageBus.is_admin_lookup do |env|
setup_message_bus_env(env)
env["__mb"][:is_admin]
end
MessageBus.on_middleware_error do |env, e|
if Discourse::InvalidAccess === e
[403, {}, ["Invalid Access"]]
elsif RateLimiter::LimitExceeded === e
[429, { 'Retry-After' => e.available_in }, [e.description]]
end
end
MessageBus.on_connect do |site_id|
RailsMultisite::ConnectionManagement.establish_connection(db: site_id)
end
MessageBus.on_disconnect do |site_id|
ActiveRecord::Base.connection_handler.clear_active_connections!
end
if Rails.env == "test"
MessageBus.configure(backend: :memory)
else
MessageBus.redis_config = GlobalSetting.message_bus_redis_config
end
MessageBus.reliable_pub_sub.max_backlog_size = GlobalSetting.message_bus_max_backlog_size
MessageBus.long_polling_enabled = SiteSetting.enable_long_polling
MessageBus.long_polling_interval = SiteSetting.long_polling_interval
MessageBus.cache_assets = !Rails.env.development?
MessageBus.enable_diagnostics
if Rails.env == "test" || $0 =~ /rake$/
# disable keepalive in testing
MessageBus.keepalive_interval = -1
end